Molding flask



April 1933- E. A. ANHEUSER ET AL MOLDING FLASK Filed April 3O, 19

11v VIN ons.- ZINE-$714 mm 6': 0176' S. REM/KER '4 7'04? 5 1- Patented Apr. 18, i933 UNITED STATES P'A'I-E NT oFFmE f ERNEST A. ANI-IEUSER, AND enonen s. REMIKER, or MILWAUKEE, Wisconsin,

MOLDING FLASK Application filed April 30,

eliminate those expenditures heretofore at- 1 taching to the manufacture of a necessary flask pattern from which objects iinpresslon in the sand a cast flask is obtained. Also, the extended machining processes in order to correct inaccuracies unavoidably present in all cast flasks, both after casting the flask, and again after this'piece ofequipment has been in use at producing castings.

The providing of flasks whose elements will be physically selective and pur'posely disposed in a way that will permit of arran'ging each element chosen-for asslst ng other co-related members to resist warping tendencies caused by alternatingexperiences which expose the flasks .to high and low temperatures. Further, to offer des gns that may be repaired with replaced elements having similar physical properties-1n keeping with the original assembly. 1.

The provision whereby the costly methods surfaces forfkeying in the sand, are dispensed with through the. convenience which allows the introduction of materials already patterned to provide desirable surfaces. Otheradvantages will be'noted throughout the particular description and pointed out in the appended claim, both of which divisions of this application refer to the accompanying drawing, whose severalfigures are indexed below. f; Fig. 1 is a plan view of a flask unit. Fig. 2 is a section on line 2-2 of.Fig. 1. Fig. 3 is a section on line33 of Fig. 1.. i Fig. 4 isa fragmentary perspective view.

Similar characters of reference apply to like parts throughout the several views. The flask assembly chosen is fully illustrative of the invention, as the identical conditions, here contended with, are considerations which afof coring, in order to gain certain ribbed 1931. Serial No. 534,000. I

feet the various designs .offlask-boxes used in the foundersart. v a r The molten metal employedpin casting flask-boxes, followed by-thecooling periods, leaves the units so madeincompletmruntil the 5 abutting surfaces at A must be accurately. machined so that the said surfaces will present smooth an'd true planes- Later on, after i the cast flasks ha-Vebeenin service, the hot; i J

and cold experiences causefurther distora tions which. require re-machining to correct them." Other defects happen tolflask structures of the cast variety, because of their tendencies towarp out of shape-, and, since they are cast as unitary bodies, there is no successful precaution that can be introduced 7 during the. casting process which would ofll set or counteract thistendency throughthe selection of parts having warp-resisting qualities that would co-act with the remaining 79 parts as a check for preserving correct alignment. J With the methods applied inthe present invention, the purposeful selecti'onof. struc tural shapes having known stress-resisting qualities makes it possible andieconomically practical to determinethe definite design-for opposing strain effects arising through varying temperatures, and such selections can, at

will," be joined together in a mannerfl which 89 does not subject thewhole to an enveloping heat such as is met with when casting the flask units by the method now in vogue. i V 'W'hen a unit is completed by theconcerned process, the structure will be complete asinitially intended without the additional expense incurred by way of machining changes. The chosen method of flask, assembling ,is definite; there being no guesswork asto what M the'outcome' will be. The slight irregularities are not appreciable set-backs, and whatever re-machining there may be,.later on, will be largely due to replacements required through accidents, or the normal wear-andv r tear. i Attention ishere directed to the scope of what a re-machiningv process amountsto when correcting the abutting planes at the jointure A. The said process affects the entire square area of the flasks plan, which area is entirely traversed by the cutting tool. In performing this work thesaid cutter is subjected to the hardship of encountering numerous abrupt beginnings, or cuts, alternating with open spaces, thereby subjecting the cutter to abuses that are costly and time consuming. lVith respect to these last considerations the present invention noticeably eliminates the out-of-service periods which reduce the time lengths of a fiasks usefulness.

The material employed in the present method of construction is, practically, wrought, or, rolled into densely compact forms, thereby not subject to fracture. Where the elements are of plate-like form these elements, when bent or otherwise distorted, are readily'forc'ed back to their original locations instead 'of having to be entirely replaced as is the case where the units are castings. Where an element must be replaced the newer installation will, in the present invention, be a physically-similar ad dition and not a physical departure, which latter, under heat and cold, will expand or contract in unison with its companion part-s. A flask structure is constructed of framing angles L. The said angles offer their base flanges 1 for opposedly abutting similar flanges 2 of like angles L, shown dotted in Fig. 4. The jointure A occurring between the angles L and L must'be a true plane that coincides with the parting'surfaces of a complete assembly which, generally, comprises two units; drag and cope. The said angles co-act, through theirwelded and pen fectly abutting relationship, to resist tend encies' to depart from their normal aspects. The angles L are further assisted in resisting distortion by virtueof the necessary ribbing which divides oif the area inclosed by saidangles. The legs 30f the anglesL will retaintheir normal aspect through the welding theretoof'the plates 4 and 5 which are accuratel'y scribed to the said angles and lend their vertical cross-sectional strength for maintalnmg the true perpend cular relation desired at the walls or legs 3, which latter return a like function for similarly affecting the plates or ribs l'and The incl-osed flask area may be again divided'up by ribs or plates 5"When necessary these latter plates are welded to the ribs t, so that a grating of rolled steel members'is formed whose individual strengthsare determined to be as used, they being, practically, a product forged to a point where they are purposely compressed elements, acting as individual members whichoppose changes in each other, a function that cannot reside in a. similar arrangement cast unitary. When cast, the ribs would be of plate-shape minus the definite physical properties present in product that has been rolled into the said plate-shape.

' I The plates 4, 5 and 5' maybe selected from closure.

' aflect areas great enough" to overcome the .methods of clamping together employed in assembling structures of this kind. Accessories usedon flask-boxes, such as trunnions 501' other requisites, can be accurately locatedand attached without experiencing the frequently occurring hardship, in large cast flask-boxes, of having to cut off the integral trunnion element and relocate same with re spect to the center of gravity, which is not always where same was assumed to be in the castflasks pattern. In the present invention there is no costly pattern required. When the welding is completed the flask-box is ready for foundry service. The elements employed, even when heated in the molding processes, return to their shapes while cooling off. When they are deformed or broken, through long service, the necessary parts are readily installed, if need be, or straightened forces, as hammering, that would-destroy a cast-metal product which latter material is'nottractable under any force tending to bend it back to a shape it has departed from. Further, the inconveniences of blow-holes, cracks and other defects, common to cast structures, are not contingencies to be reckoned with in the structure here considered.

Having described the invention what is claimed asbeing patentably novel and desired to protect byrU. S. Letters Patent, is

In a flask box the combination, a rectangular inclosure. unitary. angle elements of relatively heavy forged product integrally joined together. to form the walls of said inclosure, said elements offering outwardly extending webs abuttingly disposed in a plane normal to said walls and coincident to thepartingsurface plane of said flask box, and individual embossed plates integrally united as a grating to divideand sub-divide the aforesaid in- In testimony of which we hereunto affix our signatures. V

' ERNEST A. ANHEUSER.

GEORGE S. REMIKER. 

